Apparatus for jarring and pressing granular materials.



v H. 'TSGHERNING. APPARATUS FOR JARRING AND PRESSING GRANULAR MATERIALS. APPLICATION fILED MAY 16, 1912. 1,0 2, 0 Patented May 27, 1913.

coLLfMqlA PLIANDGRAPH co.. WASHINGTON. Dfc.

I HENRY r'scnn'nivnvaor rnnnron'r, ILLINOIS, ASSIGNOR To AficAnn ivi ivorA'c'ruIt- ING COMPANY, or FRE ron'nILLINoIsA 'ooRP'oRA'rIoiv or ILLINoIs.

APPARATUS Foe JARRING AND rnnssIN'G GRANULAR MATERIALS.

To all whom it may concern:

Be it known that I, HENRY TsonERNINe, a citizen of the United States, residing at Freeport, in the county of Stephenson and State of Illinois, have invented certain vnew and useful Improvements in Apparatus for Jarring and Pressing Granular Materials,

- of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to devices for packing molding sand or similar material by raising the receptacle in which the material is contained, releasing it and suddenly arresting its falling movement to ar the same and thereby pack it effectually, for example about a pattern; and further relates to devices whereby such a machine as has just been indicated may be used to press the ma: terial in the receptacle by the application of power.

In the accompanying drawings, Figure 1 shows the main portion of the apparatus in side elevation. with parts in section. Fig. 2 shows the same apparatus seen from the right in Fig. 1. Fig. 3 is an enlarged vertical axial section of a valve located along-' side the main cylinder. Fig. 4 1s a detail 1 section showing more fully parts seen in Fig. 1. Fig. 5 is a perspective view of a spring ring seen also in Fig. 3.

In these figures, A represents a heavy base, usually supported by wheels A, and B a vertical cylinder rising from the base and provided with an annular exhaust chamber B in communication, through a passage B with the lower portion of the interior of the cylinder or piston space. In this cylinder works a piston C having its lower end peripherally diminished and provided with a central steel block C normally resting upon the bottomof the cylinder and removably seated in a recess in the piston, from which it may be driven when desired, an axial passage C" being provided for, this purpose.- The hollow piston stem C always projects above the cylinder wherein its upper portion is guided by a bearing secured by setscrews C An annular disk C is secured to the lower end of the piston to project laterally, and between the projecting portion and the undiminished portion above lies, loosely, a broken spring ring C materially narrower, vertically, than the space in which it lies. This ring presses outward Specification of Letters i 'eltent.

' Patented May 27, 1913.

Application filed as is, 1912. Serial No. 697,819.

against the wall of the cylinder by virtue of its own elasticity and with such force that its weight will not move it from any position in which 1t may-be placed, and 1101'. mally it covers the passage B The piston supports a preferably removable table I) for the material to be operated upon, and as shown the table is held'against lateral movement by a flange .D or the like, engaging the upper end of the piston stem, In the base s mounted a horizontal rock-shaft E bearing on opposite sides of the cylinderupwardly extending arms E upon the threaded upper ends of which is adjustably fixed a strong crossbar orhead IE at such dis-' tance from the base that it may swing into and out of position above the plane of a niolding flask o-rthe like placed upon the table. Alongside the lower part of the cylginder and usually in front ofthe same, is

1' a valve chamber formed by upper and lower in this chamber works a vertically sliding casing members F, F bolted together, and

valve G which is cut away centrallyto form a deep annular groove G communicating,

by means of passages G with an internal. f downwardly open recess G 1n the valve.

The valve is provided with a stem G which passes upward through the casing wall and thence through a guide bearing G provided with a locking cam lever G to avpoint where its upper end may meet the table when the valve and the table are both in their lowest positions.

The valve casmg is provided with an annular passage or chamber F which is in communication with ithe valve chamber and also with the space below the piston in the arring cylinder, the

com1nunication in this instance being by ;means of apipe F and a channel A in the base A. The groovev in the valve contains a divld'ed spring rmg H of materially less width vertically than the groove and having initsuppermar'gin a series of notches H. This ring, like the ring C when acted upon by' gavity tion in which it may be placed.

only remains in any posi- The jarring or main cylinder B is provided with "a discharge [passage B leading from't-he chamber B to a spring closed valve VI and also to a pipe 1 controlled by a hand valve 1 The stem of the valve at I projects into the path of a swinging lever J pivoted tothe base at- J, and this lever lies in the path of a cam K upon the rock-shaft E.

The parts are so arranged that when the head E is swung from positionabove the table, as shown in Fig. 1, the cam lifts the lever J and the valve I and holds the discharge passage open, while with the head above the table, as indicated in dotted lines, thecam releases the lever and the valve remains closed.

In operation, the material to be packed being upon the table, the head E being at one side, and the valve stem Gr being freed by the cam lever, compressed fluid, such as air or steam, is admitted through the valve L and passage L to the space below the valve Gr whence it passes through the passages G, notches H, chamber F", pipe F and channel A to the space below the jarring piston C, which it quickly raises until the ring C uncovers the passage B At the same time, the valve G is also raised, and as it rises the lower wall of the groove engages the ring H and carries it upward until the notches are out of registry with the passage F and the supply of operating fluid is thus cut off from the arring piston, and the ring C being in raised position and the valve 1 being open, the jarring piston falls freely until the movement is abruptly arrested by the impact of the block C upon the bottom of the cylinder. But the piston in descending carries down the ring C closing the eX- haust at this point, and the descending table carries down the valve stem Gr and valve G, and then the ring H, the movement of the latter bringing the notches H again into registry with the chamber F thus readmitting operating fluid to repeat the entire series of operations. This is repeated very rapidly so long as the valve L is left open.

Obviously, the valve L and the conduit controlled thereby constitute'a manually controlled means for admitting compressed fluid to the inlet passage in the cylinder, the valve G and its appurtenances serve as a means for automatically interrupting at short intervals the flow of fluid admitted through the valve L, and the cam G is a means for at will holding the interrupting means out of action- VVhen it is desired to compress material upon the table, the head E is swung to the position shown in dotted lines above the table and flask or material thereon, and this movement of the head carries the cam K out of position and thus allows the spring valve I to close. The valve stem G is locked by the cam lever so that the valve G cannot rise, and the valve L being then opened,

operating fluid passes beneath the main piston forcing it upward and compressing material thereon, e. 9., sand in a molding flask, between the table and the head above. hen it is desired to discontinue such pressing, the hand valve I is opened, and if desired the valve L is closed, allowing the main piston to descend.

Obviously the hand valves may be of any desired type.

What I claim is:

1. In apparatus of the class described, the combination with a cylinder having inlet and discharge passages below, of a piston working in the cylinder, a spring-closed valve and a second valve each controlling the discharge opening when the companion valve is closed, means for admitting compressed fluid below the piston constantly or intermittently as desired, a manually operated member arranged to be swung into or out of a normal position, and means whereby the spring-closed valve is held open only while said member is out of said position.

2. In apparatus of the class described, the combination with a vertical cylinder and its piston, of a spring-closed valve in the discharge passage leading from the cylinder, a manually operated member arranged to swing into and out of a normal position, a cam operated by the movement of said member and adapted to hold said valve open only while the member is out of said position, a second, manually operated valve controlling said passage when the first valve is closed, and means for admitting compressed fluid to the space below the piston intermittently or constantly as desired.

3. In apparatus of the class described, the combination with a vertical cylinder provided below with inlet and discharge pas sages, of a piston working in the cylinder above said passages, manually controlled means for admitting compressed fluid to the inlet passage, means for holding the discharge passage closed, and means for automatically interrupting at short intervals the flow of fluid admitted by said manually controlled means, and means for at will holding said interrupting means out of action.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY TSCHERNING.

Witnesses:

L. A. MUNN, KARL F. LANDGRAF.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). O. 

